Terracolor Brush-On Earthenware Glazes are available ready to use straight from the jar, simply stir well then apply three coats to your bisque pieces. Glaze will dry quickly allowing you to move them to the kiln for firing. For best results fire 1040°C with a 30 minute soak on a computerised controller.

If a glaze is food safe or not depends on several factors including the type of clay used, the firing temperature, the shape of the vessel, the thickness of glaze even the position of the vessel in the kiln can have an effect on the glaze. Ideally a food safe test would be carried out by a reputable body like British Ceram. In the case of the glazes mentioned earthenware glazes would not pass a food safe test as bacteria can get into the cracks. The cracks appear because the glaze does not fit the clay bod, this is known as crazing. The clay body will also remain porous at such a low temperature. For food safe glazes I would recommend using a stoneware glossy glaze fired like our Nano Coloured Glazes 1260°C on a smooth stoneware body like our ES5 Original Stoneware clay, hope this helps.